Updated coin to allow for multiple flips

3 files changed, 46 insertions, 7 deletions

diff --git a/src/cmd/coin/coin.c b/src/cmd/coin/coin.c
index 09ca479..5c58b3c 100644
--- a/src/cmd/coin/coin.c
+++ b/src/cmd/coin/coin.c
@@ -1,15 +1,54 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <string.h>
+
+int coinFlip (int times);
 
 int
-main (void)
+main (int argc, char *argv[])
 {
-	int c;
-	time_t t;
-	srand((unsigned) time(&t));
+	int nflag = 0, i, times = 1, tails, heads;
+	argc--;
 
-	printf("%s\n", (rand() % 2) ? "Heads" : "Tails");
+	for (i = 1; i <= argc; i++) {
+		if (strcmp(argv[i], "-n") == 0)
+			nflag++;
+		else if (nflag == 1)
+			times = atoi(argv[i]);
+			if (times == 0) {
+				printf("Non Integer Value Inputted\n");
+				return -1;
+			}
+	}
+	if (times == 1)
+		printf("%s\n", coinFlip(times) ? "Heads" : "Tails");
+	else {
+		tails = coinFlip(times);
+		heads = times - tails;
+		float ph = (float)heads/times, pt = (float)tails/times;
+
+		printf("Heads: %d\nTails: %d\nProb Heads: %f\nProb Tails: %f\n", heads, tails, ph, pt);
+	}
 
 	return 0;
 }
+
+/* coinFlip: Flips a coin n numbers of times and returns the number of tails */
+int
+coinFlip (int times)
+{
+	int tails, i, c;
+	time_t t;
+	srand((unsigned) time(&t));
+
+	tails = 0;
+
+	for (i = 0; i < times; i++) {
+		c = rand() % 2;
+		if (c == 1)
+			tails++;
+	}
+
+	return tails;
+}
\ No newline at end of file
diff --git a/src/cmd/dice/dice.c b/src/cmd/dice/dice.c
index b31670f..f211d67 100644
--- a/src/cmd/dice/dice.c
+++ b/src/cmd/dice/dice.c
@@ -12,4 +12,4 @@ main (void)
 	printf("%d\n", (rand() % sides) + 1);
 
 	return 0;
-}
+}
\ No newline at end of file
diff --git a/src/cmd/echo/echo.c b/src/cmd/echo/echo.c
index 4733830..3dc8334 100644
--- a/src/cmd/echo/echo.c
+++ b/src/cmd/echo/echo.c
@@ -14,4 +14,4 @@ main (int argc, char *argv[])
 			printf("%s%c", argv[i], (i == argc) ? ((nflag == 1) ? '\0' : '\n') : ' ');
 	}
 	return 0;
-}
+}
\ No newline at end of file